prometheus/discovery/marathon/marathon_test.go
Rohit Gupta 30c3e02864 Fixes #4090. Marathon service discovery for 5XX http response (#4091)
Signed-off-by: rohit01 <hello@rohit.io>
2018-04-17 09:28:06 +01:00

578 lines
16 KiB
Go

// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package marathon
import (
"context"
"errors"
"io"
"net/http"
"net/http/httptest"
"testing"
"time"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/discovery/targetgroup"
)
var (
marathonValidLabel = map[string]string{"prometheus": "yes"}
testServers = []string{"http://localhost:8080"}
conf = SDConfig{Servers: testServers}
)
func testUpdateServices(client AppListClient, ch chan []*targetgroup.Group) error {
md, err := NewDiscovery(conf, nil)
if err != nil {
return err
}
md.appsClient = client
return md.updateServices(context.Background(), ch)
}
func TestMarathonSDHandleError(t *testing.T) {
var (
errTesting = errors.New("testing failure")
ch = make(chan []*targetgroup.Group, 1)
client = func(client *http.Client, url string) (*AppList, error) { return nil, errTesting }
)
if err := testUpdateServices(client, ch); err != errTesting {
t.Fatalf("Expected error: %s", err)
}
select {
case tg := <-ch:
t.Fatalf("Got group: %s", tg)
default:
}
}
func TestMarathonSDEmptyList(t *testing.T) {
var (
ch = make(chan []*targetgroup.Group, 1)
client = func(client *http.Client, url string) (*AppList, error) { return &AppList{}, nil }
)
if err := testUpdateServices(client, ch); err != nil {
t.Fatalf("Got error: %s", err)
}
select {
case tg := <-ch:
if len(tg) > 0 {
t.Fatalf("Got group: %v", tg)
}
default:
}
}
func marathonTestAppList(labels map[string]string, runningTasks int) *AppList {
var (
task = Task{
ID: "test-task-1",
Host: "mesos-slave1",
Ports: []uint32{31000},
}
docker = DockerContainer{
Image: "repo/image:tag",
PortMappings: []PortMappings{
{Labels: labels},
},
}
container = Container{Docker: docker}
app = App{
ID: "test-service",
Tasks: []Task{task},
RunningTasks: runningTasks,
Labels: labels,
Container: container,
PortDefinitions: []PortDefinitions{
{Labels: make(map[string]string)},
},
}
)
return &AppList{
Apps: []App{app},
}
}
func TestMarathonSDSendGroup(t *testing.T) {
var (
ch = make(chan []*targetgroup.Group, 1)
client = func(client *http.Client, url string) (*AppList, error) {
return marathonTestAppList(marathonValidLabel, 1), nil
}
)
if err := testUpdateServices(client, ch); err != nil {
t.Fatalf("Got error: %s", err)
}
select {
case tgs := <-ch:
tg := tgs[0]
if tg.Source != "test-service" {
t.Fatalf("Wrong target group name: %s", tg.Source)
}
if len(tg.Targets) != 1 {
t.Fatalf("Wrong number of targets: %v", tg.Targets)
}
tgt := tg.Targets[0]
if tgt[model.AddressLabel] != "mesos-slave1:31000" {
t.Fatalf("Wrong target address: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portMappingLabelPrefix+"prometheus")] != "yes" {
t.Fatalf("Wrong first portMappings label from the first port: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")] != "" {
t.Fatalf("Wrong first portDefinitions label from the first port: %s", tgt[model.AddressLabel])
}
default:
t.Fatal("Did not get a target group.")
}
}
func TestMarathonSDRemoveApp(t *testing.T) {
var ch = make(chan []*targetgroup.Group, 1)
md, err := NewDiscovery(conf, nil)
if err != nil {
t.Fatalf("%s", err)
}
md.appsClient = func(client *http.Client, url string) (*AppList, error) {
return marathonTestAppList(marathonValidLabel, 1), nil
}
if err := md.updateServices(context.Background(), ch); err != nil {
t.Fatalf("Got error on first update: %s", err)
}
up1 := (<-ch)[0]
md.appsClient = func(client *http.Client, url string) (*AppList, error) {
return marathonTestAppList(marathonValidLabel, 0), nil
}
if err := md.updateServices(context.Background(), ch); err != nil {
t.Fatalf("Got error on second update: %s", err)
}
up2 := (<-ch)[0]
if up2.Source != up1.Source {
t.Fatalf("Source is different: %s", up2)
if len(up2.Targets) > 0 {
t.Fatalf("Got a non-empty target set: %s", up2.Targets)
}
}
}
func TestMarathonSDRunAndStop(t *testing.T) {
var (
refreshInterval = model.Duration(time.Millisecond * 10)
conf = SDConfig{Servers: testServers, RefreshInterval: refreshInterval}
ch = make(chan []*targetgroup.Group)
doneCh = make(chan error)
)
md, err := NewDiscovery(conf, nil)
if err != nil {
t.Fatalf("%s", err)
}
md.appsClient = func(client *http.Client, url string) (*AppList, error) {
return marathonTestAppList(marathonValidLabel, 1), nil
}
ctx, cancel := context.WithCancel(context.Background())
go func() {
md.Run(ctx, ch)
close(doneCh)
}()
timeout := time.After(md.refreshInterval * 3)
for {
select {
case <-ch:
cancel()
case <-doneCh:
return
case <-timeout:
t.Fatalf("Update took too long.")
}
}
}
func marathonTestAppListWithMutiplePorts(labels map[string]string, runningTasks int) *AppList {
var (
task = Task{
ID: "test-task-1",
Host: "mesos-slave1",
Ports: []uint32{31000, 32000},
}
docker = DockerContainer{
Image: "repo/image:tag",
PortMappings: []PortMappings{
{Labels: labels},
{Labels: make(map[string]string)},
},
}
container = Container{Docker: docker}
app = App{
ID: "test-service",
Tasks: []Task{task},
RunningTasks: runningTasks,
Labels: labels,
Container: container,
PortDefinitions: []PortDefinitions{
{Labels: make(map[string]string)},
{Labels: labels},
},
}
)
return &AppList{
Apps: []App{app},
}
}
func TestMarathonSDSendGroupWithMutiplePort(t *testing.T) {
var (
ch = make(chan []*targetgroup.Group, 1)
client = func(client *http.Client, url string) (*AppList, error) {
return marathonTestAppListWithMutiplePorts(marathonValidLabel, 1), nil
}
)
if err := testUpdateServices(client, ch); err != nil {
t.Fatalf("Got error: %s", err)
}
select {
case tgs := <-ch:
tg := tgs[0]
if tg.Source != "test-service" {
t.Fatalf("Wrong target group name: %s", tg.Source)
}
if len(tg.Targets) != 2 {
t.Fatalf("Wrong number of targets: %v", tg.Targets)
}
tgt := tg.Targets[0]
if tgt[model.AddressLabel] != "mesos-slave1:31000" {
t.Fatalf("Wrong target address: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portMappingLabelPrefix+"prometheus")] != "yes" {
t.Fatalf("Wrong first portMappings label from the first port: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")] != "" {
t.Fatalf("Wrong first portDefinitions label from the first port: %s", tgt[model.AddressLabel])
}
tgt = tg.Targets[1]
if tgt[model.AddressLabel] != "mesos-slave1:32000" {
t.Fatalf("Wrong target address: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portMappingLabelPrefix+"prometheus")] != "" {
t.Fatalf("Wrong portMappings label from the second port: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")] != "yes" {
t.Fatalf("Wrong portDefinitions label from the second port: %s", tgt[model.AddressLabel])
}
default:
t.Fatal("Did not get a target group.")
}
}
func marathonTestZeroTaskPortAppList(labels map[string]string, runningTasks int) *AppList {
var (
task = Task{
ID: "test-task-2",
Host: "mesos-slave-2",
Ports: []uint32{},
}
docker = DockerContainer{Image: "repo/image:tag"}
container = Container{Docker: docker}
app = App{
ID: "test-service-zero-ports",
Tasks: []Task{task},
RunningTasks: runningTasks,
Labels: labels,
Container: container,
}
)
return &AppList{
Apps: []App{app},
}
}
func TestMarathonZeroTaskPorts(t *testing.T) {
var (
ch = make(chan []*targetgroup.Group, 1)
client = func(client *http.Client, url string) (*AppList, error) {
return marathonTestZeroTaskPortAppList(marathonValidLabel, 1), nil
}
)
if err := testUpdateServices(client, ch); err != nil {
t.Fatalf("Got error: %s", err)
}
select {
case tgs := <-ch:
tg := tgs[0]
if tg.Source != "test-service-zero-ports" {
t.Fatalf("Wrong target group name: %s", tg.Source)
}
if len(tg.Targets) != 0 {
t.Fatalf("Wrong number of targets: %v", tg.Targets)
}
default:
t.Fatal("Did not get a target group.")
}
}
func Test500ErrorHttpResponseWithValidJSONBody(t *testing.T) {
var (
ch = make(chan []*targetgroup.Group, 1)
client = fetchApps
)
// Simulate 500 error with a valid JSON response.
respHandler := func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusInternalServerError)
w.Header().Set("Content-Type", "application/json")
io.WriteString(w, `{}`)
}
// Create a test server with mock HTTP handler.
ts := httptest.NewServer(http.HandlerFunc(respHandler))
defer ts.Close()
// Backup conf for future tests.
backupConf := conf
defer func() {
conf = backupConf
}()
// Setup conf for the test case.
conf = SDConfig{Servers: []string{ts.URL}}
// Execute test case and validate behaviour.
if err := testUpdateServices(client, ch); err == nil {
t.Fatalf("Expected error for 5xx HTTP response from marathon server")
}
}
func marathonTestAppListWithoutPortMappings(labels map[string]string, runningTasks int) *AppList {
var (
task = Task{
ID: "test-task-1",
Host: "mesos-slave1",
Ports: []uint32{31000, 32000},
}
docker = DockerContainer{
Image: "repo/image:tag",
}
container = Container{Docker: docker}
app = App{
ID: "test-service",
Tasks: []Task{task},
RunningTasks: runningTasks,
Labels: labels,
Container: container,
PortDefinitions: []PortDefinitions{
{Labels: make(map[string]string)},
{Labels: labels},
},
}
)
return &AppList{
Apps: []App{app},
}
}
func TestMarathonSDSendGroupWithoutPortMappings(t *testing.T) {
var (
ch = make(chan []*targetgroup.Group, 1)
client = func(client *http.Client, url string) (*AppList, error) {
return marathonTestAppListWithoutPortMappings(marathonValidLabel, 1), nil
}
)
if err := testUpdateServices(client, ch); err != nil {
t.Fatalf("Got error: %s", err)
}
select {
case tgs := <-ch:
tg := tgs[0]
if tg.Source != "test-service" {
t.Fatalf("Wrong target group name: %s", tg.Source)
}
if len(tg.Targets) != 2 {
t.Fatalf("Wrong number of targets: %v", tg.Targets)
}
tgt := tg.Targets[0]
if tgt[model.AddressLabel] != "mesos-slave1:31000" {
t.Fatalf("Wrong target address: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portMappingLabelPrefix+"prometheus")] != "" {
t.Fatalf("Wrong first portMappings label from the first port: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")] != "" {
t.Fatalf("Wrong first portDefinitions label from the first port: %s", tgt[model.AddressLabel])
}
tgt = tg.Targets[1]
if tgt[model.AddressLabel] != "mesos-slave1:32000" {
t.Fatalf("Wrong target address: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portMappingLabelPrefix+"prometheus")] != "" {
t.Fatalf("Wrong portMappings label from the second port: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")] != "yes" {
t.Fatalf("Wrong portDefinitions label from the second port: %s", tgt[model.AddressLabel])
}
default:
t.Fatal("Did not get a target group.")
}
}
func marathonTestAppListWithoutPortDefinitions(labels map[string]string, runningTasks int) *AppList {
var (
task = Task{
ID: "test-task-1",
Host: "mesos-slave1",
Ports: []uint32{31000, 32000},
}
docker = DockerContainer{
Image: "repo/image:tag",
PortMappings: []PortMappings{
{Labels: labels},
{Labels: make(map[string]string)},
},
}
container = Container{Docker: docker}
app = App{
ID: "test-service",
Tasks: []Task{task},
RunningTasks: runningTasks,
Labels: labels,
Container: container,
}
)
return &AppList{
Apps: []App{app},
}
}
func TestMarathonSDSendGroupWithoutPortDefinitions(t *testing.T) {
var (
ch = make(chan []*targetgroup.Group, 1)
client = func(client *http.Client, url string) (*AppList, error) {
return marathonTestAppListWithoutPortDefinitions(marathonValidLabel, 1), nil
}
)
if err := testUpdateServices(client, ch); err != nil {
t.Fatalf("Got error: %s", err)
}
select {
case tgs := <-ch:
tg := tgs[0]
if tg.Source != "test-service" {
t.Fatalf("Wrong target group name: %s", tg.Source)
}
if len(tg.Targets) != 2 {
t.Fatalf("Wrong number of targets: %v", tg.Targets)
}
tgt := tg.Targets[0]
if tgt[model.AddressLabel] != "mesos-slave1:31000" {
t.Fatalf("Wrong target address: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portMappingLabelPrefix+"prometheus")] != "yes" {
t.Fatalf("Wrong first portMappings label from the first port: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")] != "" {
t.Fatalf("Wrong first portDefinitions label from the first port: %s", tgt[model.AddressLabel])
}
tgt = tg.Targets[1]
if tgt[model.AddressLabel] != "mesos-slave1:32000" {
t.Fatalf("Wrong target address: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portMappingLabelPrefix+"prometheus")] != "" {
t.Fatalf("Wrong portMappings label from the second port: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")] != "" {
t.Fatalf("Wrong portDefinitions label from the second port: %s", tgt[model.AddressLabel])
}
default:
t.Fatal("Did not get a target group.")
}
}
func marathonTestAppListWithContainerPortMappings(labels map[string]string, runningTasks int) *AppList {
var (
task = Task{
ID: "test-task-1",
Host: "mesos-slave1",
Ports: []uint32{31000, 32000},
}
docker = DockerContainer{
Image: "repo/image:tag",
}
container = Container{
Docker: docker,
PortMappings: []PortMappings{
{Labels: labels},
{Labels: make(map[string]string)},
},
}
app = App{
ID: "test-service",
Tasks: []Task{task},
RunningTasks: runningTasks,
Labels: labels,
Container: container,
}
)
return &AppList{
Apps: []App{app},
}
}
func TestMarathonSDSendGroupWithContainerPortMappings(t *testing.T) {
var (
ch = make(chan []*targetgroup.Group, 1)
client = func(client *http.Client, url string) (*AppList, error) {
return marathonTestAppListWithContainerPortMappings(marathonValidLabel, 1), nil
}
)
if err := testUpdateServices(client, ch); err != nil {
t.Fatalf("Got error: %s", err)
}
select {
case tgs := <-ch:
tg := tgs[0]
if tg.Source != "test-service" {
t.Fatalf("Wrong target group name: %s", tg.Source)
}
if len(tg.Targets) != 2 {
t.Fatalf("Wrong number of targets: %v", tg.Targets)
}
tgt := tg.Targets[0]
if tgt[model.AddressLabel] != "mesos-slave1:31000" {
t.Fatalf("Wrong target address: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portMappingLabelPrefix+"prometheus")] != "yes" {
t.Fatalf("Wrong first portMappings label from the first port: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")] != "" {
t.Fatalf("Wrong first portDefinitions label from the first port: %s", tgt[model.AddressLabel])
}
tgt = tg.Targets[1]
if tgt[model.AddressLabel] != "mesos-slave1:32000" {
t.Fatalf("Wrong target address: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portMappingLabelPrefix+"prometheus")] != "" {
t.Fatalf("Wrong portMappings label from the second port: %s", tgt[model.AddressLabel])
}
if tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")] != "" {
t.Fatalf("Wrong portDefinitions label from the second port: %s", tgt[model.AddressLabel])
}
default:
t.Fatal("Did not get a target group.")
}
}